Outlet-box.



BEST A JAILABLE COPY C. J. KLEIN. OUTLET Box. APPLICATIdN FILED MAR. 16. 39M.

Patontedfiept. 1 4, 1915.

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OO OO 1 o o o o qfio o o o 5 boxes and the like.

GHAJRIIQES J. KLEIN, 0F MILWAUKEE, WISCONSIN, ASSIG'ZNOR TO THE GUTLER-HAEdEIEH MFG. (30., OF MILWAUKEE, WISCONSIN, A COEIFORATION 0F WISCQITSIN.

OUTLET-BOX.

Specification of Letters Patent Patented Sept. lid, 11.915.

Application filed March 16, 1914. Serial No. 825,112.

To all whom. it may concern:

Be it known that I, CHARLES J. KLEIN, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented new and useful Improvements in Outlet-Boxes, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming part of this specification.

This invention relates to electrical outlet Such boxes are commonly set in plastered walls with their outer edges flush therewith. The boxes are also usually provided with cover-plates marginally overlapping the plastered surface. In practice, however, such cover-plates are po sitioned considerably after installation of the boxes, and during such interim the plaster. thereabout is often accidentally chipped and broken or cracked by shrinkage, thereby presenting an unsightly appearance. Furthermore, it has been found that the plaster adheres poorly around the edges of the box, thus necessitating a cover-plate materially larger than the box to conceal the raw edges of the plaster.

' This invention has for its objects to provide an improved outlet box adaptedto materially overcome the liability of shipping or cracking of a contiguous plaster surface. In order to more clearly disclose my in vention I have illustrated two embodiments thereof in the accompanying drawing,

wherein,

Figure 1 is a perspective view of one form of outlet box; Fig. 2 is a sectional view of one wall of the box shown in Fig. 1, showifig in addition the box margin flush with a cementitious surface; and, Fig. 3 is an elevation of the second form of box.

The device shown comprises a conventionally shaped metallic receptacle 1 provided ing, the projecting edges 3 of the box are provided with closely spaced irregularities to which the plaster is adapted to rigidly adhere. In Fig. 1 these irregularities are shown as comprising corrugations 1-, preferably flared slightly at their outer ends. lln

Fig. 3 the edges of the box are provided thereby materially lessening the liability of chipping or cracking of the plaster. Accordingly, the size of cover-plates required for the box need be only slightly larger than the open end of the same, thus economizing in the metal of such plates. Furthermore, the box may be installed without presenting 'an unsightly appearance which has heretofore been a serious objection thereto.

What I claim as new and desire to secure by Letters Patent is:

1. As an article of manufacture, an electrical outlet box for plastered walls having its outer margin provided with a multiplicity of relatively small and abrupt irregularities for plaster thereto.

2. As an article of manufacture, an outlet box for plastered walls having numerous exterior irregularities adjacent its outer edges, said irregularities being of small size and'angi'llarl'y abrupt with respect to the remaining surface of the box exterior and affording a gripping surface for plaster contiguous thereto.

tangular outlet box having its outer margins corrugated, the corrugations being relatively small and presenting a rough area to grip plaster contiguous thereto.

In. witness whereof, I have hereunto subscribed my'name in the presence of two witnesses.

QHA RLES J. KLEIN. -Witnesses:

S. F. WALSON, TERM Bani.

effecting close adhesion of so I 3. As an article of manufacture, a rec- 

